Recall that the order of increasing strength for the type of bond appears as: single < double < triple
Strength is inversely proportional to the length which makes single bond as the longest while triple bond the shortest.
First choice tells us that the shortest and strongest can be seen at II which is correct since we are comparing a double and a triple bond for I and II
Compare the C-to-C bond length and strength for the following compounds.
a. The shortest and strongest bond is found in compound II
b. The shortest and weakest bond is found in compound I
c. The shortest and strongest bond is found in compound I
d. The shortest and weakest bond is found in compound II
e. The bonds are of identical length and strength
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